Stellar Automotive Group TH425/TH400 Shift Kit for Cadillac Buick Olds 1964-1992

Stellar Automotive Group TH400 & TH425 Performance Shift Kit compatible for Cadillac, Buick, Oldsmobile & Pontiac (1964-1992)

Transform the feel of your classic Turbo-Hydramatic with this professional-grade shift improvement kit from Stellar Automotive Group.

Designed for all TH400 (rear-wheel drive) and TH425 (front-wheel drive) 3-speed automatics found in:

• Cadillac DeVille, Fleetwood, Eldorado, Seville

• Buick Riviera, LeSabre, Electra

• Oldsmobile 98, Toronado

• Pontiac Bonneville & Grand Prix

Features & Benefits:

• Firmer, positive shifts without being harsh – perfect for street and highway driving
• Eliminates delayed, mushy upshifts common in high-mileage units
• Upgraded boost valve and springs increase line pressure for better clutch holding
• No special tools required – installs during routine valve body service

Give your legendary TH400/TH425 the crisp, confident shift quality it had when new.

Add to cart now and feel the difference on your next drive!